Select by Steel Grade

Composition: 100% compliance with required standards

4130

4140

4145H MOD

4340

4330V

4317

9Cr

13Cr

Select by Process

Multiple Options to Meet Your Needs

Solid Bars

High quality

Hollow Bars

Single-end boring

Rolled Bars

Hot rolling line

Forged Bars

Ratio greater than 4:2

No Heat Treatment

Hot Rolled/Forged only

Quenched Tempered(QT)

75KSI,110KSI,125KSI,130KSI

Black Surface

Heat-treated

Bright Surface

Rough turning, Polishing

We Deliver According to the Standards of the Petroleum Association

API 7-1

API 6A

API 5CT

API 5CP

Application

For Drill Collars

Our Materials Are Used by Customers to Produce Oil Drilling Collars, Including Non-Magnetic Steel Drill Collars.
We Can Also Provide Finished Drill Collars. Feel Free to Contact Us for Inquiries!

For Stabilizer

We Can Manufacture Stabilizers with Anti-Rust Oil Coating, Yellow Anti-Rust Plating, and More. Large-Scale Exports Available.

Process

Smelting Process:
Electric arc furnace + ladle refining + vacuum degassing.

Manufacturing Process:
Forged+Normalizing + rough turning + quenching + tempering + rough turning

Boring process:

Start boring from one end only, ensure no steps on the inner wall, must pass drift through-bore diameter test.

Equipment

Normalizing Furnace

Annealing Furnace

Quenching & Tempering

Induction Coil Treated

Rough Turning Machine

Polishing Equipment

Inspection

Quality Is the Cornerstone of Our Company

Straightness

Roughness

QTC

Tensile Strength

Yield Strength

Reduction of Area

Hardness

Charpy Impact Test

Non-metallic Inclusion

100% Ultrasonic Non-Destructive Testing

• Testing complies with SEP1921 E/e standards.
• Diameter 38mm ≤ Φ ≤ 150mm: 3.2mm FBH.
• Diameter Φ > 150mm: 6.4mm FBH.
• No more than two defects of 2mm within a 13mm spacing in any direction.
• 100% testing of each piece.
• Inspectors are certified to ISO 9712 Level II or above.

Documentation Provided:

• Quality Certification: EN10204 TYPE3.1
• Furnace Temperature Reports: Available for each batch.
• Heat Treatment Reports: Includes original heating furnace records and detailed heat treatment data.

NQA ISO 9001

API Q1

Customer Cases

Majority of Positive Reviews

Marking

Packaging

Loading

Shipping

Receipt

Usage Status

FAQ

1. How can I contact you for a quote?

Please email us at [email protected] for more details.

2. What is the minimum order quantity (MOQ)?

The MOQ is one piece. Larger orders receive discounted pricing.

3. What is the delivery time?

Standard delivery time is 20-30 days. For long-term partners, lead times are further optimized.

4. How do you ensure quality?

• We strictly follow international quality standards.
• Samples are retained for over 2 years to ensure traceability.
• Our testing and inspection process guarantees the reliability of every product.

5. Which companies do you collaborate with?

We are trusted by leading companies such as ThyssenKrupp, Weatherford, and others.

Why Choose Us?

• Global Reach: We export to countries all over the world.
• Competitive Pricing: Benefit from both production and cost advantages.
• Proven Expertise: Decades of experience in the oilfield steel industry.